Review the Create a follower section for notes on selecting a plan size. Use the search and select the database you want to create a follower from. You can also create followers through the web dashboard: availableĬreating a Follower via the Heroku Data Dashboard Waiting for database HEROKU_POSTGRESQL_WHITE_URL. The heroku pg:wait command outputs the provisioning status of any new databases. Preparing a follower can take anywhere from several minutes to several hours, depending on the size of your dataset. done, v71 ($200/mo)įollower will become available for read-only queries when up-to-date $ heroku addons:create heroku-postgresql:standard-2 -follow HEROKU_POSTGRESQL_CHARCOAL_URLĪdding heroku-postgresql:standard-2 to sushi. It’s recommended that unless you’re downgrading plans, a follower be created using the same or higher plan than the leader database. Followers can be up to 4 plans below their leader’s plan, unless the follower’s plan has burstable characteristics ( Postgres Plan Characteristics), in which case the follower can only be up to 1 plan below their leader’s plan. Replication is subject to lag as Trusted IP ranges for data services aren’t currently available for Shield Spacesįollowers don’t have to be the same database plan as their leader.Enable Trusted IP ranges for data services to avoid follower lag.Shield Private Space (different from Leader’s Space) Shield Private Space (same Leader’s Space) Private Space (different from Leader’s Space) The following table summarizes where and how you can implement followers: Leader The exact timeframe varies depending on the size of the database to be followed and is typically between a few minutes and a few hours. Followers can’t be created for a period on newly forked databases (this applies to both explicit forks and forks created through unfollow). Create a FollowerĪ follower can be created for any Standard, Premium, or Enterprise tier database that is itself not a follower (that is, followers can’t be chained). As writes and other data modifications are committed in the leader database, the changes are streamed, in real time, to the follower databases. Followers, like all Heroku Postgres databases, are charged on a pro-rated basis based on the plan of the follower.Ī database follower is a read-only copy of the leader database that stays up to date with the leader database data.
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